Finding the Fourth Proportional to 9,316.63, 12,857.12 and 5,067.79

Step by Step Solution

1. Step 1: Write the proportion equation
   9,316.63 : 12,857.12 = 5,067.79 : x
2. Step 2: Convert to fraction form
   9,316.63/12,857.12 = 5,067.79/x
3. Step 3: Cross multiply
   9,316.63x = 12,857.12 × 5,067.79
4. Step 4: Simplify right side
   9,316.63x = 65,157,196.10
5. Step 5: Solve for x
   x = 65,157,196.10/9,316.63
6. Step 6: Final answer
   x = 6,993.65